#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

// just a test program 

/* this program can provide a D state main process and a S state sub process on x86 Linux but only one S state sub process on Openwrt
* we can use set_pid_state to change this process state from S state into D state
*/
int main() {  
	if (!vfork())  {
		sleep(100);  
	}
} 
